Dump-door-operating mechanism.



A r.' -SB'ABERG. DUMQ? DOOR OPERATING MBGHANISM. APPLIUATION FIL'ED FEB. 6 1900.

gbgl. Patented Oct. 19,1909,

4 SHEETS-SHEET 1.

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F. SEABERG DUMP DOOR OPERATING MEGEANISM.

APPLIOATIQN FILED IYB. 6, 1909.

P. SEABERG. l DUMP DOOR OPERATING MEGH'ANISM. l

APPLICATION FILED FEB. 6, 1909.l A

Patented Get. 19,1909

4 SHEETS-SHEET 3 RSEABERG. DUMP DOOR OPERATING MEGHANISMl YPIIUATION FILED FEB. 6, 1909.

Patented Got. 19, 1909.

4 SHEETS-SHEET j zw UNITED; STATES PATENT oEErcE.

FREDERICK SEA/BERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL DUMP CAR COMPANY, A CORPORATION OF MAINE.

DUMP-'DOOR-OPERATING MECHANISM.

To all whom 'it may concern? `i Be it known` that I, FREDERICK SEABERG, a citizen of the United States, residing at Ohicago, in the county of Cook and State lof Illinois, have invented certain new and useful Improvements in Dump Door Operating Mechanism, of,v which thefollowing.. is a I specification.

-When the doors are closed.

One of theolojects `of' my invention'is to provide a dump` door mechanism especially adapted for use in connection with tlat bot-- .tom cars provided with drop doors, in which provision is made for carrying the contents of the car when discharged beyond the track rails. The invention, however, is applicable to cars lof other types, and will serve the same useful function in all cases where it is desired to carry the discharged load beyond the point Where it would ,fall'if the dump doors were pivoted upon fixed hinges.v

Another object of my invention is to pro` y'vide a' lchain operated door with positive means for retaining the door in closed position and relieving the chains from strain Other and further objects and advantages of my invention will appearfrom the following description and'claims, taken in connec tion with the accompanying drawings, in vvhich- `Figure 1 is an endview .partially in sec` tion of a car equipped with-one specific embodiment of my invention. Fig. 2 is a view similar to Fig. 1, showingfthe dumpdoors open. Fig. 3 is a sidevelevati'on of part of the car shown in the preceding views. Fig. l is a fragmentary side elevation' of'part of the car shovvinthe door raising mechanism.

Fig. 5 is a section on the line 5, 5 of Fig. 4,'

Fig. 6 is a scctlon on the line 6, 6 vof Fio. 5

v showing the bearlng of the Wlndmg shaft` 1n Specification of Letters Patent. i Application led February 6, 1909. Serial No.

Patented oct. 19, 1909.

floor plate 7 occupies the central portion of the car. The spaces'formed by the members y Each of the dump doors 8 is connected to` the underframof the car by pairs of links 9, 10. In the present instance, these links are pivoted at their outer ends to the door 8 and at their inner ends to transverse angles 11 riveted to the top of the center sill. As clearly shown in Figs. 1 and 2, the len h of the links 9, 10 and their points of attac ment to the center sill structure and to the doors are so proportioned and arranged that the links do not lie parallel but are disposed at! an angle to each other. The outer link-9 is of considerably greater length than the inner link 10, whereby an outer thrust is imposed upon the door when its free edge is lowered,

thereby carrying said free edge outward to- Ward the lside oi? the car sufficiently to insure the discharge of the load beyond the track rail.

The longitudinal central Hoor late. 7 occupies a position above the inner e ges of the dump doors 8, and the hinge links of rthe dump doors and the operatmg mechanism therefor are s o disposedzthat When the door is closed it lies snugly beneath the horizontal Hanges of the angles 6, the central Hoor plate 7 and the angles''at the foot, of the car sides.

For the purpose of operating the doors, 1 provide winding shafts 12 rotatably mounted at the sides of the car beneath the floor level. The shafts 12 are preferably square in cross section and are provided with bushings 30 fitted thereto and rotatably mounted in bearings 3l secured to the cross members of the car. Winding chains 13 are secured at' one end to said shaft 12 and at the opposite end to the doors 8 adjacent their outer edges, For the purpose of rotating the Winding shaft. 12 to close the door's, I provide any snitable'forni of ope1ati11gmechanism at the ends of the car. In Fig. 1, a suit,-

able operating lever 14 is shown, the same being pivotally mounted upon the .shaft 12. The operating lever carries a reversible pawl 15 adapted to engage a pinion 16 secured to the operating shaft 12. By means of the reversible pawl 15 such shaft may be turned in either direction. rlhe reversible pawl 15 is also shown in Fig. 3, together with a second pinion 1T also secured to the shaft 12, the latter pinion being engaged by a detent .18 mounted upon the end of the car and adapted to hold the shaft 12 against rotation when desired. Preferably, there are four shafts 12, each extending :from one end of the car to the center thereof, and each operating halt' of the doors upon one -side of the car. For the purpose of relieving the chains 13 from strain when the doors are closed, I secure to the shafts 12 pinions 19 adjacent the edge of each of the dump doors, and upon the outer edge of each of the dump doors, l secure coacting racks 20 formed upon castings 21 riveted-to the under side oi' the dump doors. As illustrated, the' operating chains 13 are preferably connected to the doors 8 through the castings 21, said castings being provided with a downward proiection in which an aperture 22 is formed, and with a laterally extending web 23 through which an eyebolt 24 extends. The chain 13 is passed through the aperture 22 and its end link engaged with the e e of. the eyebolt, the latter being held in p ace by a nut 25 above the web 23. rlhe rack 20 inclines upwardly and inwardly from the free edge of the door. Upon Winding the cha-in upon the shaft 12 the doors will be raised from the position shown in Fig. 2 to that illustrated in Fig. 1, andas the doors approach the closed position, the racks 20 will engage the pinions 19, whereupon move# ment will be communicated directly from said pinions to the door,'a'nd owing to the inclination of the racks 20, the upward movement of the doors after their racks ensaid pinions will be accompanied by an inward thrust which will bring the links -10 to a vertical position, as illustrated in Fig. 1. Upon rotating the shafts 12 in transverse direction, the doors will be per.,-

vmitted to drop and will assume the position illustrated in Fig. 2.

I will have it understood that I do not desire to limit myself to the precise construction and arrangement of parts shown in drawings and herein described, as various modifications or alterations may be rindo without departing from my original invention as defined in the appended claims. l? or instance, the inclination of the racks 20 is necessary only in connection with thedea oi so mounting the doors that they will move bodily, outward when opened to clear the track rails. ,Such inclination would not be necessary in connection with a door having a simple concentric movement upon an ordinary hinge joint.

It is obvious that other variations from the specific structure illustrated would be included within my invention.

I claim:

1.111 a car, a floor provided with a door opening, a dump door mounted at one edge of said opening `to have a pivotal movement with respect to the door o ening and a bodily movement transverse y thereof, a pinion beneath the floor adjacent the opposite edge of said door opening, a rack on the door operatively related to said pinion, and means for raising the door.

2. ln a car, a lioor provided with a door opening, a door, a link pivoted at one end to the car frame adjacent one edge of said door opening and at the other end to said door, a pinion beneath the floor adjacent the opposite edge of said door opening, a rack on the door operatively related to said pinion, and means for raising the door.

3. In a car, a lioor provided with a door opening, a door, a pair of links adjacent one e ge of said opening, each pivoted at one end to the car 'frame and at the other end to said door, said links being angularly disposed with relation to each other, and means adjacent the opposite edge of said opening for raising said dor.

4. In a car, a floor provided with a door o ening, a1 door, a pair of links adjacent one e ge of said o enmg, each ivoted at one end to the'car rame and at t e other end to said door, said links being angularly disposed with relation to each other, a pinion beneath the floor adjacent the opposite edge of said door opening, a rack on the door operatively related to said pinion, and means for raising the door.

5. In a car, a floor provided with a door opening, a. dump door mounted at one edge of said opening to have a pivotal movement with respect to the door o ening and a bodily movement transverse y thereof, a pinion beneath the oor adjacent the oppo- `site edge of said opening, an inclined rack on the door operatlvely related to said pin- ^ion, and means for raising the door.

"'6. In a car, a floor provided with a door openings. dump door mounted at one edge o said opening to have a pivotal movement with respect to the door opening and a bodily movement transversely thereof, a winding shaft beneath the floor adjacent the opposite ed e of said opening, a pinion secured to `said siaft, a chain extending from said shaft to the free edge of said doen-a rack upon said door adjacent its free edge, and means for rotating said shaft.

7. In a .carpa floor provided with a door opening, a door, apair of links adjacent one edge -of said opening, each pivoted at one end i door 'adjacentits free eolge, and means for to the car frame and atfthe other end to said rotating said shaft. 10

door, said' links being angularly disposed In testimony whereof, I. have Subscribed with relation to each othelya winding shaft my name.

5 beneath `the floorvadjacent the opposite edge I FREDERICK SEABERG.

of said opening, a pinion secured to said Witnesses: shaft, a chain Iextending from said shaft to WALTER A. SCOTT,

the free edge of said door, a rack upon said HENRY A. PARKS. 

